Noun - Pertains to a person who "crawls" the internet as a hobby and becomes knowledgeable about things in all corners of the internet including the latest fad websites, internet slang, viral content, and popular culture and information.

Allen is such and internet crawler, he is constantly browsing forums, reading cracked articles, and quoting the latest memes.

Bob is always trying to show me youtube videos and send me links to funny pictures he found, he's an internet crawler.